The fire is 95% contained and should be fully under control Thursday, according to the Cal Fire website. Small fires reignited within the footprint the blaze made across the Point Mugu and Newbury Park mountains and vegetation-filled hillsides.

Although the cause of the fire remains under investigation, officials said Sunday that they had ruled out arson and instead believed the blaze was started by a small "undetermined roadside ignition of grass/debris."

"The area is considered a collection point for fuels and ignition sources. Due to the topography, the fire quickly spread, fanned by strong east winds," Cal Fire said in a statement.